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Prolastin.18 the Mean in Vivo Recovery 18,19 of Alpha1-PI Was 4.2 Mg (Immunologic)/Dl Per Mg (Functional)/Kg Body Weight Administered

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Prolastin.18 the Mean in Vivo Recovery 18,19 of Alpha1-PI Was 4.2 Mg (Immunologic)/Dl Per Mg (Functional)/Kg Body Weight Administered 08937789 (Rev. January 2005) ipated in a study of acute and/or chronic replacement therapy with Prolastin.18 The mean in vivo recovery 18,19 of alpha1-PI was 4.2 mg (immunologic)/dL per mg (functional)/kg body weight administered. The 18,19 Alpha1-Proteinase Inhibitor (Human) half-life of alpha1-PI in vivo was approximately 4.5 days. Based on these observations, a program of chronic replacement therapy was developed. Nineteen of the subjects in these studies received w Prolastin replacement therapy, 60 mg/kg body weight, once weekly for up to 26 weeks (average 24 weeks Prolastin of therapy). With this schedule of replacement therapy, blood levels of alpha1-PI were maintained above 18-20 80 mg/dL (based on the commercial standards for alpha1-PI immunologic assay). Within a few FOR INTRAVENOUS USE ONLY weeks of commencing this program, bronchoalveolar lavage studies demonstrated significantly increased levels of alpha -PI and functional antineutrophil elastase capacity in the epithelial lining fluid 1 5 8 1 of the lower respiratory tract of the lung, as compared to levels prior to commencing the program of 18-20 chronic replacement therapy with Alpha1-Proteinase Inhibitor (Human), Prolastin. All 23 individuals who participated in the investigations were immunized with Hepatitis B Vaccine and received a single dose of Hepatitis B Immune Globulin (Human) on entry into the investigation. Although no other steps were taken to prevent hepatitis, neither hepatitis B nor non-A, non-B hepatitis occurred in any of the subjects.18,19 All subjects remained seronegative for HIV antibody. None of the subjects developed any detectable antibody to alpha1-PI or other serum protein. Long-term controlled clinical trials to evaluate the effect of chronic replacement therapy with Prolastin on the development of or progression of emphysema in patients with congenital alpha1-antitrypsin deficiency have not been performed. Estimates of the sample size required of this rare disorder and the slow, progressive nature of the clinical course have been considered impediments in the ability to DESCRIPTION conduct such a trial.21 Studies to monitor the long-term effects will continue as part of the postapproval process. Alpha1-Proteinase Inhibitor (Human), Prolastinw is a sterile, stable, lyophilized preparation of purified human Alpha1-Proteinase Inhibitor (alpha1-PI), also known as alpha1-antitrypsin. Prolastin is intended INDICATIONS AND USAGE for use in therapy of congenital alpha1-antitrypsin deficiency. Prolastin is prepared from pooled human plasma of normal donors by modification and refinements Congenital Alpha1-Antitrypsin Deficiency 1 of the cold ethanol method of Cohn. Part of the fractionation may be performed by another licensed Alpha1-Proteinase Inhibitor (Human), Prolastin is indicated for chronic replacement therapy of manufacturer. In order to reduce the potential risk of transmission of infectious agents, Prolastin has individuals having congenital deficiency of alpha1-PI (alpha1-antitrypsin deficiency) with clinically been heat-treated in solution at 60�0.5°C for not less than 10 hours. However, no procedure has demonstrable panacinar emphysema. Clinical and biochemical studies have demonstrated that with been found to be totally effective in removing viral infectivity from plasma fractionation products. In such therapy, it is possible to increase plasma levels of alpha1-PI, and that levels of functionally active 18-20 vitro studies designed to evaluate the capacity of the Prolastin manufacturing process to alpha1-PI in the lung epithelial lining fluid are increased proportionately. As some individuals with remove/inactivate viruses have been conducted to provide additional assurance of the viral safety alpha1-antitrypsin deficiency will not go on to develop panacinar emphysema, only those with profile as shown in the table below. evidence of such disease should be considered for chronic replacement therapy with Prolastin.22 Subjects with the PiMZ or PiMS phenotypes of alpha1-antitrypsin deficiency should not be considered Process Step Log10 Virus Reduction for such treatment as they appear to be at small risk for panacinar emphysema.22 Clinical data are * Human immunodeficiency virus, type 1 HIV-1* BVDV** PRV*** Reo† HAV†† PPV‡ ** Bovine viral diarrhea virus (BVDV) was chosen not available as to the long-term effects derived from chronic replacement therapy of individuals with to model hepatitis C virus Fractionation of alpha1-antitrypsin deficiency with Prolastin. Only adult subjects have received Prolastin to date. Effluent I to II+III 3.4 3.5 3.9 2.1 1.4 1.0 *** Pseudorabies virus (PRV) was used as a surrogate for hepatitis B virus and the human Prolastin is not indicated for use in patients other than those with PiZZ, PiZ(null) or Pi(null)(null) PEG Precipitation 4.4 3.2 3.4 3.4 3.1 3.3 herpes viruses phenotypes. ≥ ≥ ≥ ≥ ≥ † Reovirus type 3 (Reo) was chosen to model Depth Filtration 4.7 4.1 4.7 4.0 2.8 4.3 non-enveloped viruses Pasteurization ≥6.3 4.8 ≥4.8 N/A N/A N/A †† Human hepatitis A virus (HAV). CONTRAINDICATIONS ‡ Porcine parvovirus (PPV) was selected as a Accumulated Log10 surrogate for human parvovirus B19 Individuals with selective IgA deficiencies who have known antibody against IgA (anti-IgA antibody) Reduction ≥18.8 15.6 ≥16.8 ≥9.5 ≥7.3 ≥8.6 should not receive Alpha1-Proteinase Inhibitor (Human), Prolastin, since these patients may experience severe reactions, including anaphylaxis, to IgA which may be present. The specific activity of Prolastin is �0.35 mg functional alpha1-PI/mg protein and when reconstituted as directed, the concentration of alpha1-PI is �20 mg/mL. When reconstituted, Prolastin has a pH of WARNINGS 6.6–7.4, a sodium content of 100–210 mEq/L, a chloride content of 60–180 mEq/L, a sodium Because this product is made from human blood, it may carry a risk of transmitting infectious phosphate content of 0.015–0.025 M, a polyethylene glycol content of not more than (NMT) 5 ppm, agents, e.g. viruses, and, theoretically, the Creutzfeldt-Jakob (CJD) agent. The risk that such and NMT 0.1% sucrose. Prolastin contains small amounts of other plasma proteins including alpha2­ products will transmit an infectious agent has been reduced by screening plasma donors for plasmin inhibitor, alpha1-antichymotrypsin, C1-esterase inhibitor, haptoglobin, antithrombin III, alpha1­ prior exposure to certain viruses, by testing for the presence of certain current virus infections, lipoprotein, albumin, and IgA.1 and by inactivating and/or removing certain viruses. Despite these measures, such products can Each vial of Prolastin contains the labeled amount of functionally active alpha1-PI in milligrams per vial still potentially transmit disease. There is also the possibility that unknown infectious agents (mg/vial), as determined by capacity to neutralize porcine pancreatic elastase.1 Prolastin contains no may be present in such products. Individuals who receive infusions of blood or plasma products preservative and must be administered by the intravenous route. may develop signs and/or symptoms of some viral infections, particularly hepatitis C. ALL infections thought by a physician possibly to have been transmitted by this product should be CLINICAL PHARMACOLOGY reported by the physician or other healthcare provider to Talecris Biotherapeutics, Inc. [1-800­ 520-2807]. Alpha1-antitrypsin deficiency is a chronic, hereditary, usually fatal, autosomal recessive disorder in which a low concentration of alpha1-PI (alpha1-antitrypsin) is associated with slowly progressive, severe The physician should discuss the risks and benefits of this product with the patient, before panacinar emphysema that most often manifests itself in the third to fourth decades of life.2-9 [Although prescribing or administering it to a patient. the terms “Alpha -Proteinase Inhibitor” and “alpha -antitrypsin” are used interchangeably in the scientific 1 1 Alpha -Proteinase Inhibitor (Human), Prolastin has been heat-treated in solution at 60°C for 10 hours literature, the hereditary disorder associated with a reduction in the serum level of alpha -PI is conven­ 1 1 in order to reduce the potential for transmission of infectious agents.1 No cases of hepatitis, either tionally referred to as “alpha -antitrypsin deficiency” while the deficient protein is referred to as “Alpha ­ 1 1 hepatitis B or hepatitis C, have been recorded to date in individuals receiving Prolastin.18 However, as Proteinase Inhibitor”10]. The emphysema is typically worse in the lower lung zones.4,8,9 The pathogenesis all individuals received prophylaxis against hepatitis B, no conclusion can be drawn at this time of development of emphysema in alpha -antitrypsin deficiency is not well understood at this time. It is 1 regarding potential transmission of hepatitis B virus. believed, however, to be due to a chronic biochemical imbalance between elastase (an enzyme capable of degrading elastin tissues, released by inflammatory cells, primarily neutrophils, in the lower respiratory PRECAUTIONS tract) and alpha -PI (the principal inhibitor of neutrophil elastase), which is deficient in alpha -antitrypsin 1 1 General disease.11-15 As a result, it is believed that alveolar structures are unprotected from chronic exposure to elastase released from a chronic, low-level burden of neutrophils in the lower respiratory tract, resulting 1. Administer within 3 hours after reconstitution. Do not refrigerate after reconstitution. in progressive degradation of elastin tissues.11-15 The eventual outcome is the development of 2. Administer only by the intravenous route. emphysema. Neonatal hepatitis with cholestatic jaundice appears in approximately 10% of newborns with 15 15 3. As with any colloid solution, there will be an increase in plasma volume following intravenous alpha1-antitrypsin deficiency. In some adults, alpha1-antitrypsin deficiency is complicated by cirrhosis. 23 administration of Alpha1-Proteinase Inhibitor (Human), Prolastin. Caution should therefore be 15 A large number of phenotypic variants of alpha1-antitrypsin deficiency exists. The most severely used in patients at risk for circulatory overload.
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